1 files changed, 428 insertions, 0 deletions

diff --git a/libusal/scsi-aix.c b/libusal/scsi-aix.c
new file mode 100644
index 0000000..a7b4be6
--- /dev/null
+++ b/libusal/scsi-aix.c
@@ -0,0 +1,428 @@
+/*
+ * This file has been modified for the cdrkit suite.
+ *
+ * The behaviour and appearence of the program code below can differ to a major
+ * extent from the version distributed by the original author(s).
+ *
+ * For details, see Changelog file distributed with the cdrkit package. If you
+ * received this file from another source then ask the distributing person for
+ * a log of modifications.
+ *
+ */
+
+/* @(#)scsi-aix.c	1.36 04/01/14 Copyright 1997 J. Schilling */
+/*
+ *	Interface for the AIX generic SCSI implementation.
+ *
+ *	This is a hack, that tries to emulate the functionality
+ *	of the usal driver.
+ *
+ *	Warning: you may change this source, but if you do that
+ *	you need to change the _usal_version and _usal_auth* string below.
+ *	You may not return "schily" for an SCG_AUTHOR request anymore.
+ *	Choose your name instead of "schily" and make clear that the version
+ *	string is related to a modified source.
+ *
+ *	Copyright (c) 1997 J. Schilling
+ */
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; see the file COPYING.  If not, write to the Free Software
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <sys/scdisk.h>
+
+/*
+ *	Warning: you may change this source, but if you do that
+ *	you need to change the _usal_version and _usal_auth* string below.
+ *	You may not return "schily" for an SCG_AUTHOR request anymore.
+ *	Choose your name instead of "schily" and make clear that the version
+ *	string is related to a modified source.
+ */
+static	char	_usal_trans_version[] = "scsi-aix.c-1.36";	/* The version for this transport*/
+
+
+#define	MAX_SCG		16	/* Max # of SCSI controllers */
+#define	MAX_TGT		16
+#define	MAX_LUN		8
+
+struct usal_local{
+	short	usalfiles[MAX_SCG][MAX_TGT][MAX_LUN];
+};
+#define	usallocal(p)	((struct usal_local*)((p)->local))
+
+#define	MAX_DMA_AIX (64*1024)
+
+static	int	do_usal_cmd(SCSI *usalp, struct usal_cmd *sp);
+static	int	do_usal_sense(SCSI *usalp, struct usal_cmd *sp);
+
+/*
+ * Return version information for the low level SCSI transport code.
+ * This has been introduced to make it easier to trace down problems
+ * in applications.
+ */
+static char *
+usalo_version(SCSI *usalp, int what)
+{
+	if (usalp != (SCSI *)0) {
+		switch (what) {
+
+		case SCG_VERSION:
+			return (_usal_trans_version);
+		/*
+		 * If you changed this source, you are not allowed to
+		 * return "schily" for the SCG_AUTHOR request.
+		 */
+		case SCG_AUTHOR:
+			return (_usal_auth_cdrkit);
+		case SCG_SCCS_ID:
+			return (__sccsid);
+		}
+	}
+	return ((char *)0);
+}
+
+static int
+usalo_help(SCSI *usalp, FILE *f)
+{
+	__usal_help(f, "DKIOCMD", "SCSI transport for targets known by AIX drivers",
+		"", "bus,target,lun or UNIX device", "1,2,0 or /dev/rcd0@", FALSE, TRUE);
+	return (0);
+}
+
+static int
+usalo_open(SCSI *usalp, char *device)
+{
+		int	busno	= usal_scsibus(usalp);
+		int	tgt	= usal_target(usalp);
+		int	tlun	= usal_lun(usalp);
+	register int	f;
+	register int	b;
+	register int	t;
+	register int	l;
+	register int	nopen = 0;
+	char		devname[32];
+
+	if (busno >= MAX_SCG || tgt >= MAX_TGT || tlun >= MAX_LUN) {
+		errno = EINVAL;
+		if (usalp->errstr)
+			snprintf(usalp->errstr, SCSI_ERRSTR_SIZE,
+				"Illegal value for busno, target or lun '%d,%d,%d'",
+				busno, tgt, tlun);
+		return (-1);
+	}
+
+	if (usalp->local == NULL) {
+		usalp->local = malloc(sizeof (struct usal_local));
+		if (usalp->local == NULL)
+			return (0);
+
+		for (b = 0; b < MAX_SCG; b++) {
+			for (t = 0; t < MAX_TGT; t++) {
+				for (l = 0; l < MAX_LUN; l++)
+					usallocal(usalp)->usalfiles[b][t][l] = (short)-1;
+			}
+		}
+	}
+
+	if ((device != NULL && *device != '\0') || (busno == -2 && tgt == -2))
+		goto openbydev;
+
+	if (busno >= 0 && tgt >= 0 && tlun >= 0) {
+
+		snprintf(devname, sizeof (devname), "/dev/rcd%d", tgt);
+		f = openx(devname, 0, 0, SC_DIAGNOSTIC);
+		if (f < 0) {
+			if (usalp->errstr)
+				snprintf(usalp->errstr, SCSI_ERRSTR_SIZE,
+					"Cannot open '%s'. Specify device number (1 for cd1) as target (1,0)",
+					devname);
+			return (0);
+		}
+		usallocal(usalp)->usalfiles[busno][tgt][tlun] = f;
+		return (1);
+	} else {
+		if (usalp->errstr)
+			snprintf(usalp->errstr, SCSI_ERRSTR_SIZE,
+				"Unable to scan on AIX");
+		return (0);
+	}
+openbydev:
+	if (device != NULL && *device != '\0' && busno >= 0 && tgt >= 0 && tlun >= 0) {
+		f = openx(device, 0, 0, SC_DIAGNOSTIC);
+		if (f < 0) {
+			if (usalp->errstr)
+				snprintf(usalp->errstr, SCSI_ERRSTR_SIZE,
+					"Cannot open '%s'",
+					devname);
+			return (0);
+		}
+
+		usallocal(usalp)->usalfiles[busno][tgt][tlun] = f;
+		usal_settarget(usalp, busno, tgt, tlun);
+
+		return (++nopen);
+	}
+	return (nopen);
+}
+
+static int
+usalo_close(SCSI *usalp)
+{
+	register int	f;
+	register int	b;
+	register int	t;
+	register int	l;
+
+	if (usalp->local== NULL)
+		return (-1);
+
+	for (b = 0; b < MAX_SCG; b++) {
+		for (t = 0; t < MAX_TGT; t++) {
+			for (l = 0; l < MAX_LUN; l++) {
+				f = usallocal(usalp)->usalfiles[b][t][l];
+				if (f >= 0)
+					close(f);
+				usallocal(usalp)->usalfiles[b][t][l] = (short)-1;
+			}
+		}
+	}
+	return (0);
+}
+
+static long
+usalo_maxdma(SCSI *usalp, long amt)
+{
+	return (MAX_DMA_AIX);
+}
+
+#define	palign(x, a)	(((char *)(x)) + ((a) - 1 - (((UIntptr_t)((x)-1))%(a))))
+
+static void *
+usalo_getbuf(SCSI *usalp, long amt)
+{
+/* assume having a modern AIX here */
+#ifdef HAVE_ALLOCA_H
+    usalp->bufbase = (void *)valloc((size_t)amt);
+    return (usalp->bufbase);
+#else
+	void	*ret;
+	int	pagesize = getpagesize();
+
+	if (usalp->debug > 0) {
+		fprintf((FILE *)usalp->errfile,
+				"usalo_getbuf: %ld bytes\n", amt);
+	}
+	/*
+	 * Damn AIX is a paged system but has no valloc()
+	 */
+	usalp->bufbase = ret = malloc((size_t)(amt+pagesize));
+	if (ret == NULL)
+		return (ret);
+	ret = palign(ret, pagesize);
+	return (ret);
+#endif
+}
+
+static void
+usalo_freebuf(SCSI *usalp)
+{
+	if (usalp->bufbase)
+		free(usalp->bufbase);
+	usalp->bufbase = NULL;
+}
+
+static BOOL
+usalo_havebus(SCSI *usalp, int busno)
+{
+	register int	t;
+	register int	l;
+
+	if (busno < 0 || busno >= MAX_SCG)
+		return (FALSE);
+
+	if (usalp->local == NULL)
+		return (FALSE);
+
+	for (t = 0; t < MAX_TGT; t++) {
+		for (l = 0; l < MAX_LUN; l++)
+			if (usallocal(usalp)->usalfiles[busno][t][l] >= 0)
+				return (TRUE);
+	}
+	return (FALSE);
+}
+
+static int
+usalo_fileno(SCSI *usalp, int busno, int tgt, int tlun)
+{
+	if (busno < 0 || busno >= MAX_SCG ||
+	    tgt < 0 || tgt >= MAX_TGT ||
+	    tlun < 0 || tlun >= MAX_LUN)
+		return (-1);
+
+	if (usalp->local == NULL)
+		return (-1);
+
+	return ((int)usallocal(usalp)->usalfiles[busno][tgt][tlun]);
+}
+
+static int
+usalo_initiator_id(SCSI *usalp)
+{
+	return (-1);
+}
+
+static int
+usalo_isatapi(SCSI *usalp)
+{
+	return (FALSE);
+}
+
+static int
+usalo_reset(SCSI *usalp, int what)
+{
+	if (what == SCG_RESET_NOP)
+		return (0);
+	if (what != SCG_RESET_BUS) {
+		errno = EINVAL;
+		return (-1);
+	}
+	/*
+	 * XXX Does this reset TGT or BUS ???
+	 */
+	return (ioctl(usalp->fd, SCIORESET, IDLUN(usal_target(usalp), usal_lun(usalp))));
+}
+
+static int
+do_usal_cmd(SCSI *usalp, struct usal_cmd *sp)
+{
+	struct sc_iocmd req;
+	int	ret;
+
+	if (sp->cdb_len > 12)
+		comerrno(EX_BAD, "Can't do %d byte command.\n", sp->cdb_len);
+
+	fillbytes(&req, sizeof (req), '\0');
+
+	req.flags = SC_ASYNC;
+	if (sp->flags & SCG_RECV_DATA) {
+		req.flags |= B_READ;
+	} else if (sp->size > 0) {
+		req.flags |= B_WRITE;
+	}
+	req.data_length = sp->size;
+	req.buffer = sp->addr;
+	req.timeout_value = sp->timeout;
+	req.command_length = sp->cdb_len;
+
+	movebytes(&sp->cdb, req.scsi_cdb, 12);
+	errno = 0;
+	ret = ioctl(usalp->fd, DKIOCMD, &req);
+
+	if (usalp->debug > 0) {
+		fprintf((FILE *)usalp->errfile, "ret: %d errno: %d (%s)\n", ret, errno, errmsgstr(errno));
+		fprintf((FILE *)usalp->errfile, "data_length:     %d\n", req.data_length);
+		fprintf((FILE *)usalp->errfile, "buffer:          0x%X\n", req.buffer);
+		fprintf((FILE *)usalp->errfile, "timeout_value:   %d\n", req.timeout_value);
+		fprintf((FILE *)usalp->errfile, "status_validity: %d\n", req.status_validity);
+		fprintf((FILE *)usalp->errfile, "scsi_bus_status: 0x%X\n", req.scsi_bus_status);
+		fprintf((FILE *)usalp->errfile, "adapter_status:  0x%X\n", req.adapter_status);
+		fprintf((FILE *)usalp->errfile, "adap_q_status:   0x%X\n", req.adap_q_status);
+		fprintf((FILE *)usalp->errfile, "q_tag_msg:       0x%X\n", req.q_tag_msg);
+		fprintf((FILE *)usalp->errfile, "flags:           0X%X\n", req.flags);
+	}
+	if (ret < 0) {
+		sp->ux_errno = geterrno();
+		/*
+		 * Check if SCSI command cound not be send at all.
+		 */
+		if (sp->ux_errno == ENOTTY || sp->ux_errno == ENXIO ||
+		    sp->ux_errno == EINVAL || sp->ux_errno == EACCES) {
+			return (-1);
+		}
+	} else {
+		sp->ux_errno = 0;
+	}
+	ret = 0;
+	sp->sense_count = 0;
+	sp->resid = 0;		/* AIX is the same rubbish as Linux here */
+
+	fillbytes(&sp->scb, sizeof (sp->scb), '\0');
+	fillbytes(&sp->u_sense.cmd_sense, sizeof (sp->u_sense.cmd_sense), '\0');
+
+	if (req.status_validity == 0) {
+		sp->error = SCG_NO_ERROR;
+		return (0);
+	}
+	if (req.status_validity & 1) {
+		sp->u_scb.cmd_scb[0] = req.scsi_bus_status;
+		sp->error = SCG_RETRYABLE;
+	}
+	if (req.status_validity & 2) {
+		if (req.adapter_status & SC_NO_DEVICE_RESPONSE) {
+			sp->error = SCG_FATAL;
+
+		} else if (req.adapter_status & SC_CMD_TIMEOUT) {
+			sp->error = SCG_TIMEOUT;
+
+		} else if (req.adapter_status != 0) {
+			sp->error = SCG_RETRYABLE;
+		}
+	}
+
+	return (ret);
+}
+
+static int
+do_usal_sense(SCSI *usalp, struct usal_cmd *sp)
+{
+	int		ret;
+	struct usal_cmd	s_cmd;
+
+	fillbytes((caddr_t)&s_cmd, sizeof (s_cmd), '\0');
+	s_cmd.addr = sp->u_sense.cmd_sense;
+	s_cmd.size = sp->sense_len;
+	s_cmd.flags = SCG_RECV_DATA|SCG_DISRE_ENA;
+	s_cmd.cdb_len = SC_G0_CDBLEN;
+	s_cmd.sense_len = CCS_SENSE_LEN;
+	s_cmd.cdb.g0_cdb.cmd = SC_REQUEST_SENSE;
+	s_cmd.cdb.g0_cdb.lun = sp->cdb.g0_cdb.lun;
+	s_cmd.cdb.g0_cdb.count = sp->sense_len;
+	ret = do_usal_cmd(usalp, &s_cmd);
+
+	if (ret < 0)
+		return (ret);
+	if (s_cmd.u_scb.cmd_scb[0] & 02) {
+		/* XXX ??? Check condition on request Sense ??? */
+	}
+	sp->sense_count = sp->sense_len - s_cmd.resid;
+	return (ret);
+}
+
+static int
+usalo_send(SCSI *usalp)
+{
+	struct usal_cmd	*sp = usalp->scmd;
+	int	ret;
+
+	if (usalp->fd < 0) {
+		sp->error = SCG_FATAL;
+		return (0);
+	}
+	ret = do_usal_cmd(usalp, sp);
+	if (ret < 0)
+		return (ret);
+	if (sp->u_scb.cmd_scb[0] & 02)
+		ret = do_usal_sense(usalp, sp);
+	return (ret);
+}